Submission #923281

#	Time	Username	Problem	Language	Result	Execution time	Memory
923281		vjudge1	Maxcomp (info1cup18_maxcomp)	C++17	15 / 100	1 ms	4444 KiB

maxcomp

#include <bits/stdc++.h>

#pragma GCC optimize("Ofast")
#pragma GCC target("avx2")

using namespace std;

#define ll long long
#define ld long double
#define pb push_back
#define pf push_front
#define pii pair<int,int>
#define all(v) v.begin(),v.end()
#define F first
#define S second
#define mem(a,i) memset(a,i,sizeof(a))
#define sz(s) (int)s.size()
#define int ll
#define y1 yy
#define maksim gay
#define ppb pop_back
#define gcd(a,b) __gcd(a,b)
#define in insert

const int dx[4]={-1,0,1,0};
const int dy[4]={0,-1,0,1};

const int inf=1e16;
const int N=5e4+100;
const int MAX=1010;
const int mod=1e9+7;


int n,m;
int a[MAX][MAX];
int mn[MAX][MAX];
int mx[MAX][MAX];

void solve(){
  cin>>n>>m;
  for(int i=1;i<=n;i++){
    for(int j=1;j<=m;j++){
      cin>>a[i][j];
    }
  }
  for(int i=0;i<=n;i++)for(int j=0;j<=m;j++){
    mn[i][j]=-inf;
    mx[i][j]=-inf;
  }
  int ans=-inf;
  for(int i=1;i<=n;i++){
    for(int j=1;j<=m;j++){
      mn[i][j]=max(mn[i-1][j],mn[i][j-1]);
      ans=max(ans,a[i][j]+mn[i][j]-i-j);
      mn[i][j]=max(mn[i][j],-a[i][j]+i+j-1);
    }
  }
  for(int i=1;i<=n;i++){
    for(int j=1;j<=m;j++){
      mx[i][j]=max(mx[i-1][j],mx[i][j-1]);
      ans=max(ans,mx[i][j]-a[i][j]-i-j);
      mx[i][j]=max(mx[i][j],a[i][j]+i+j-1);
    }
  }
  cout<<ans<<"\n";
}

main(){
  // freopen("prizes.in", "r", stdin);
  // freopen("prizes.out", "w", stdout);
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  int t=1;
  // cin>>t;
  while(t--){
    solve();
  }
}

Compilation message (stderr)

maxcomp.cpp:68:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   68 | main(){
      | ^~~~

• Subtask 1: 0 / 15
• Subtask 2: 15 / 15
• Subtask 3: 0 / 30
• Subtask 4: 0 / 40